startup: add test for Pipe & PipeMap

profile_default/startup/init.py

@@ -149,3 +149,6 @@ class Pipe:
 class PipeMap(Pipe):
     def __init__(self, function: typing.Callable[[typing.Any], typing.Any]) -> None:
         self._function = functools.partial(map, function)
+
+
+assert range(65, 68) | PipeMap(chr) | PipeMap(str.lower) | Pipe(list) == ["a", "b", "c"]